, it won't just hurt families already struggling, it will actually harm our economy. unemployment insurance is one of the most effective ways there is to boost our economy. when people have money to spend on basic necessities, that means more customers for our businesses and ultimately more jobs. >>> fighting a report the president says allowing the benefits to expire could cost businesses 240,000 jobs. >>> the california public utilities commission has announced it's joining the investigation into this week's disabled bart train incident. at least nine people went to the hospital wednesday after the train became stuck in a berkeley hills tunnel. bart says the train stopped after a short caused emergency brakes to activate, creating a smoky dust that made several passengers sick. >>> could the latest diet craze be as simple as taking a walk? more people are tracking their steps to lose weight and many are using technology developed right here in the bay area. here is health and science reporter carolyn johnson. >> reporter: chris walks five miles a day just getting ar